Device for recovering well-sections.



H. NELSON.

DEVXCE FOR RECOVERING WELL SECTIONS.

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2 SHEETSS Patehted Jan APPLICATION FILED JUNEKB, 19H.

H. NELSON.

DEVICE FOR RECOVERING WELL SECTIONS.

' APPLICATION FILED JUNE I8, 19!]. i Patented Jan. 7, 1919.

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UNITED STATES ATENT ornron.

HENRY NELSON, OF NORTHWOOD, IOWA, ASSIGNOR 0F ONE-HALF TO T. SOPI-IU-SHANSON, OF NORTHWOOD, IOWA.

DEVICE FOR RECOVERING WELL-SECTIONS.

Specification of Letters Patent.

Patented Jan. 7, 1919.

T 0 all whom it may concern Be it known that I, HENRY NELSON, a citizenof the United States, residing in the city of Northwood, county ofWorth, and State of Iowa, have invented certain new and use fulImprovements in Devices for Recovering Well-Sections, of which thefollowing is a specification.

This invention relates to improvements in well devices and refers moreparticularly to a tool for recovering various portions of wells of thecased type, although the invention, in its broader aspects, is notnecessarily limited to the particular type of well mentioned.

In various well constructions the lifting rods, casings and other partsare formed of metal sections and are coupled together by screw -threadedcoupling member. However, it frequently happens that one or more of thesections become uncoupled, thus, not only rendering the well inoperativebut making difiicult the recovery of the sections so disengaged.

Among the objects of the present invention are to provide a recoveringtool which can be easily engaged with the threaded end of the section orsections remaining in the well, irrespective of whether the couplingmember is detached from the upper or lower section; to provide a toolwhich can be used interchangeably for recovering either rod or casing,and in general to provide a new and improved recovering tool of thecharacter referred to.

In the drawings:

Figure .1 is a vertical, sectional view, partly in elevation through awell of the type to which my invention is particularly adapted.

Fig. 2 is a fragmentary, of the casing disengaged.

Fig. 3 is a view similar to Fig. 2 showing a portion of the lifting roduncoupled.

Figs. 1 and 5 are views showing the manner of engaging the recoveringtool with the casing sections.

Figs. 6 and 7 are views showing the manner of engaging the recoveringtool with the lifting rod sections.

In detail, and referring first to the general construction shown in Fig.1, 1 designates the casing, within which there is positioned the pipesections 2. The usual sucker or lifting rod 3 is extended through thepipe 2 sectional view to the valve mechanism (not shown). At its topend, the upper pipe section is screwthreaded into the pump housing 1,the various pipe sections 2 being secured by threaded couplings 5. Incase the coupling member becomes. disengaged either from the pipesection above or below it, it generally moves down out of engagementwith the upper part, so as to render the well inoperative.

Heretofore, great difliculty has been encountered in pulling up sectionsthus disengaged and the present invention relates to an improved tool bymeans of which said section or sections or pipes as may have becomedisen aged ma be lifted upward.

ssuming first that the coupling member has remained on the uppersection, as shown in Fig. 1, the remaining section or sections arerecovered in the following manner: The pump housing 4 is removed and theupper section or sections of the pipe lifted out. The recovering tool 6is then inserted into the well and engaged with the threads 7 of thepipe section 2. This recovering tool comprises a body section 8 having ascrewthreaded part 9, adapted to fit over and engage the threadedportion 7 of the pipe. Depending from below its body portion, therecovering tool has a flaring or bell mouth guiding section 10, which,as it passes downward over the upper end of the pipe will guide thethreaded portion of the latter where it will be engaged by the internalthreads 9 on the recovering tool. The latter is operated by a suitablelength of tubing, non-rotatatively secured to the recovering tool at 12.Thus by rotating the tubular member 11, the recovering tool will bethreaded on the upper end of the pipe section and the recovering tooland pipe section can then be lifted out of the well. If, however, thecoupling 5 becomes disengaged from the lower end of one of the pipesections, it will be left upon the upper end of the section remaining inthe well. I have provided means whereby in such case, the same tool canalso be employed for recovering the pipe sections. This arrangementcomprises inserting a threaded nipple 13 in the threaded portion 9 ofthe recovering tool; this nipple at its lower end being externallythreaded to fit into the threads of the coupling member 5. Thus, whenthe recovering tool is moved downward over the upper end of the pipesection, the threads on the nipple 13 will become engaged with thecoupling member so as to lock the latter and the pipe sections to therecovering tool after which they can be lifted to the upper end of thewell, and the necessary reen-gagement of the pipe sections made.

In the particular construction of wells shown in the drawings, thelifting rod 3 is such cases, I employ the same recovering tool butprovide it with a nipple 16, threaded into the upper end of the couplingmember and provided with an internally threaded seat 17. This nipplemember also has beveled edges 18, which cooperate with the flaring mouthof the recovering tool for guiding the upper end of the lifting rodsection into engagement with the threaded seat 17. Rotation of theoperating rod 19 will then couple the latter to the upper end of thesection or sections left in. the well so that these sections can belifted to the upper end of the well, the rod can couple up in the usualmanner. In case, however, the coupling member 14: has been left on theupper end of the portion remaining in the well, the nipple 16 isreversed, so that in place of pre senting a threaded seat at its lowerend, it has a downwardly projecting stud 20, which will fit into theupper end of the coupling member 14 and lock the parts together. It isto be noted that the nipple 16 is so formed that it is capable ofuse inrecovering rods,

both where the coupling member was left Copies of this patent may beobtained for five cents each, by addres Washington, D. 0.

.on the section remaining in the well or was disengaged from suchsection.

In the above description, it wvill be obvious that I have Provided asimple and efficient tool by means of which either the pipe or thelifting rod sections can be recovered, although the invention is notnecessarily limited to a tool adapted to perform both functions andvarious changes can be made in the details of construction andarrangements and combinations of parts without departing from the scopeof my invention.

I claim as my invention:

1. A tool for recovering well sections hav ing threaded ends andcoupling connections 7 comprising a body portion having an inter nallythreaded portion adapted to engage the external threads of the sectionto be removed, a detachable nipple member adapted to receive the threadsof the coupling mem- I ber in case the coupling is left upon the Wellsection to be recovered, a beveled mouth guide member secured to thebody portion,

and an operating rod having rigid connecw tion with the body portion.

2. A tool for recovering Well sections hav ing threaded ends andcoupling connections comprising a body portion having an internallythreaded portion adapted to engage the external threads of the sectionto be removed, a detachable nipple member adapted to receive the,threads of the coupling member in case the coupling is left upon thewell section to be recovered, a beveled mouth guide member secured tothe body portion, a

second nipple member for recovering a lifting rod having detachablescrew threaded engagement with said body portion and being reversible tointerlock with either the lifting rod or its coupling, and an operatingmember rigidly connected to the body portion.

HENRY NELSON.

sing the Commissioner of Patents,

